public interface InterA {
    public default void show1(){
        System.out.println("开始执行");
        show3();
    }
    public default void show2(){
        System.out.println("开始执行了");
        show3();
    }
    private void show3(){
        System.out.println("记录");
    }
    public static void show4(){
        System.out.println("show4---");

    }
}
